Perhaps you should try some spelling variations:
chuc danh » chuc nganh, thuc hanh, chuc nang
doanh thi » doanh tai, doanh thu, oanh thi
van quang » van quan, tran quang, van tuan
quang cao » nang cao, quang nam
chu manh » ho manh, chu han, chu van
doan thi » dan thi, doanh tai, hoang thi
lan cong » luan cong, lanh cong, van cong
cong van » cong vang, cong san, song van

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chuc danh) OR (chu manh)) - hanh ((doanh thi) OR (doan thi)) lan cong van quang cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chuc danh) or (chu manh)) - hanh ((doanh thi) OR (doan thi)) lan cong van quang cao~".
• Adding a wildcard symbol may retrieve word variants: theo ((chuc danh) or (chu manh)) - hanh ((doanh thi) OR (doan thi)) lan cong van quang cao*.